Muslim pilgrims keep social distancing as they circumambulate the Kaaba, the cubic building at the Grand Mosque, during the final ritual of the hajj that pilgrims must perform before they return home, in the holy city of Mecca, Saudi Arabia, Thursday, July 22, 2021. The coronavirus has taken its toll on the annual hajj for a second year running. What once drew some 2.5 million Muslims from all walks of life from across the globe, the hajj pilgrimage is now almost unrecognizable in scale. (AP Photo/Amr Nabil)

Muslim pilgrims pray as they circumambulate the Kaaba, the cubic building at the Grand Mosque, during the final ritual of the hajj that pilgrims must perform before they return home, in the Muslim holy city of Mecca, Saudi Arabia, Thursday, July 22, 2021. The coronavirus has taken its toll on the annual hajj for a second year running. What once drew some 2.5 million Muslims from all walks of life from across the globe, the hajj pilgrimage is now almost unrecognizable in scale. (AP Photo/Amr Nabil)

Muslim pilgrims keep social distancing as they circumambulate the Kaaba, the cubic building at the Grand Mosque, during the final ritual of the hajj that pilgrims must perform before they return home, in the Muslim holy city of Mecca, Saudi Arabia, Thursday, July 22, 2021. The coronavirus has taken its toll on the annual hajj for a second year running. What once drew some 2.5 million Muslims from all walks of life from across the globe, the hajj pilgrimage is now almost unrecognizable in scale. (AP Photo/Amr Nabil)

A Muslim pilgrim holds an umbrella to protect his relative from the sun as they pass by Maqam Ibrahim, or the Station of Abraham, during Tawaf al-Widaa, or the "farewell circling," at the Grand Mosque in the holy city of Mecca, Saudi Arabia, Thursday, July 22, 2021. The coronavirus has taken its toll on the hajj for a second year running. What once drew some 2.5 million Muslims from all walks of life from across the globe, the hajj pilgrimage is now almost unrecognizable in scale. (AP Photo/Amr Nabil)

Muslim pilgrims circumambulate the Kaaba, the cubic building at the Grand Mosque, which is the final ritual of the hajj that pilgrims must perform before they return home, at the Grand Mosque in the holy city of Mecca, Saudi Arabia, Thursday, July 22, 2021. The coronavirus has taken its toll on the hajj for a second year running. What once drew some 2.5 million Muslims from all walks of life from across the globe, the hajj pilgrimage is now almost unrecognizable in scale. (AP Photo/Amr Nabil)